Abstract: A confined space entry device and/or fall arrester for use in securing a person working at elevation, the device including modularized components which allow it to be readily reconfigured. In particular, the extension arm of the device is removably secured to one end of an elbow, the other end of which is removably secured to a post or mast which is securely anchored, for example, to a base. The device can include arms and elbows of different configurations and lengths for various applications in the field.

Abstract: A confined space entry device and/or fall arrester for use in securing a person working at elevation, the device including modularized components which allow it to be readily reconfigured. In particular, the extension arm of the device is removably secured to one end of an elbow, the other end of which is removably secured to a post or mast which is securely anchored, for example, to a base. The device can include arms and elbows of different configurations and lengths for various applications in the field.

Abstract: An assembly for directing air to a desired location for use as an air blower, carpet drier or the like. An air blower component in a preferred embodiment includes an outlet having attachment means engageable with a separate component such as a ducting housing or carpet drier attachment, through engageable lugs.

Abstract: A method and apparatus for a shelter, particularly useful in servicing outdoor utility and telecommunications cabinets. A tent is detachably engageable with the cabinet through a set of flexible beads extending along tent flaps which slidably engage with a set of slotted rails mounted to the perimeter of the cabinet.

Abstract: A lightweight, spacious and collapsible tent having an apex and contacting the ground on three struts, utilizing: three collapsible subframes each containg four struts pivotally connected at one end to a central hub and extending radially outward to a distal end; a flexible covering having four sides and corners, said covering overlaying the hub and struts and extending so that each corner extends to the distal end of a strut; each of said subframes being connected along two sides to one of the sides of each of the other two subframes; each of said subframes having a strut the distal end of which is pivotally connected to the distal end of a strut from each of the other two subframes to form the apex of the tent; and each of said subframes resting on the ground on the distal end of a strut farthest from the apex.

Abstract: The invention relates to a stable tent or shelter, particularly an open sided shelter, such as a hospitality test, comprising a roof and supporting legs. The roof has at least one frame for supporting a covering, the frame being provided with at least one hub and with stiff struts, the struts being hingably connected to the hub, in a plane perpendicular to the hub, and being hingable relative to the hub beyond a dead-center position, the struts being connected at their free ends with the perimeter of the covering. The shelter is characterized by a tensioning cord, for applying force to the free end of the struts in a direction perpendicular to the length of the strut and toward the center-line passing through the hub and for simultaneously connecting the free end of the roof strut, a leg associated with the strut and a roof skirt extending between adjacent struts, all of which cooperate to stabilize the shelter.

Abstract: The invention relates to a collapsible shelter comprising a cloth of supple, sheet-like material and of at least one frame for stretching the sheet-like material, said frame being provided with at least one hub and with rods having high bending strength, said rods being hingably connected to the hub, in a plane perpendicular to the hub, and being hingable relative to the hub beyond a dead center, at least a number of said rods being connected at their free ends with the sheet-like material. The shelter includes a pull cord which is secured at one of its ends to the material and is positioned through a cord eyelet mounted at the free end of the rod so that the material can be pulled outward from the hub toward the free end of the rod, with the other end of the cord being releasably secured in a clamp located on the rod between the eyelet and the hub.

Abstract: A gas-fired construction heater which meets the applicable ANSI Standard and operates to supply heated air separately from products of combustion. The products of combustion are permitted to contain no more than a specified percent of carbon monoxide when uncontrolled heater operating conditions are within predetermined ranges. The uncontrolled operating conditions include variations in input rate and supply voltage. A combustion chamber produces the products of combustion and has primary and secondary combustion zones. A heat exchanger receives the products of combustion and transfers heat therefrom to fresh air to be heated. The chamber and the heat exchanger define a tertiary combustion zone. Inlets supply a separate natural combustion draft to each of the primary and tertiary combustion zones. The inlets include a first and a third fixed-area inlet for respectively supplying the separate natural drafts to the primary and tertiary combustion zones.

Abstract: A hub for providing an articulating interconnection between the ends of tent frame struts, comprising a base member and a cap member rotatably interconnected by a common axis of rotation to form an encasement having a plurality of interior cavities equally spaced radially from the common axis, a like plurality of elongated windows each having top and side framing portions and a sill, each in communication with one of the cavities, a like plurality of radial slots in the base member in respective communication with one of the said windows and a like plurality of sockets, each having a spherical terminating end portion and disposed in each of said cavities.

Abstract: A self supporting collapsible tent structure having a tension bearing polygonal shaped floor member defining a first tent level, a plurality of hub members each carrying a plurality of sockets which are pivotal about axes which are co-planer and are interrelated one to the other as the sides of polygon, a series of said hub members disposed in a plane at a second tent level which is spaced apart from said first tent level and whose sockets are pivotal in a first direction, and additional series of said hub members disposed in a plane at a third tent level which is spaced apart from said second tent level and whose sockets are pivotal in a second direction, opposite to the said first direction, a single, apex forming hub member disposed at a fourth tent level and whose sockets are pivotal in said first direction, a first plurality of compression rods, the ends of which are seated in the said sockets of the hub members in slightly curved polygonal planes defined and bounded by the rod members and a second plura

Abstract: A tenting structure with two angularly related sidewalls forming a roof and having at least one collapsible frame for externally supporting each of the sidewalls and where the frame includes a hub radially carrying a plurality of flexible struts whose distal ends are secured in external pockets positioned around the edges of each of the sidewalls and where the frame is sized and dimensioned in respect to the sidewalls that the frame members take on a compression induced dish shaped outward bow. The hub includes a plurality of pivotal strut mounting sockets which rotate about their pivotal axis to a discrete splayed position and to a definitive stowed position.

Abstract: The invention relates to a spring-biased foot subassembly for use in the lower corners of a wall panel of a ground tent to yieldably resist the tension placed upon such panels when the diagonally-extending portions of the subframes supporting same in free-standing relation elongate as they move from an inwardly bowed partially folded relation out and over center where they assume a more or less straight line relation and on beyond into a fully-extended and outwardly-bowed position. The same elements that yieldably resist this tensioning of the wall panel also cooperate therewith to maintain the latter taut and under slight tension once the subframe has moved into its fully-extended and outwardly-bowed wall-supporting position.

Abstract: A blower which is specifically designed not only to purge a workplace of foul air preparatory to it being entered by personnel but also to provide these people with adequate ventilation once they are inside, such a blower being characterized by a hollow generally cylindrically-shaped open-ended outer housing having an intake end at the rear thereof and a discharge end in front, a collapsible purging hose with its rear end attached inside the outer housing adjacent the intake end of the latter and extendable out through its discharge end into a workplace to be purged, a generally frustoconical inner housing having its larger diameter intake end spaced to the rear of the intake end of the outside housing while at the same time cooperating therewith when positioned inside thereof to define one or more air-aspirating ports therebetween as well as an annulus for the storage of the purging hose in collapsed condition, a blower attached to deliver air to the intake end of the inner housing and cooperate therwith whe

Abstract: This invention relates to an improved self-adjusting hub and strut-endcap assembly for tent frame roof and wall struts characterized by a two-part hub section sandwiched together in stacked relation to define a set of four sockets, each of which has a channel-shaped entryway which is adapted to receive the socket-forming neck projecting from the ball on the inner end of one of the strut endcaps for limited side-to-side movement therein when in extended position as well as movement between its extended position and a folded position wherein the strut connected thereto lies in nested essentially parallel relation to the other struts of the frame.

Abstract: This invention relates to an improved free-standing tent frame having at least three four-sided collapsible subframes linked together in side-by-side relation and angled relative to one another so as to stand alone while leaving a gap between the endmost subframes, and a triangularly-segmented roof frame having one more triangular segment than there are subframes in the wall structure. The invention is also characterized by a hub assembly for the subframes of the wall assembly that comprises a series of three or more strut-receiving socket subassemblies hingedly interconnected to produce a closed polygon in which those having four or more sides are self-adjusting to accommodate various included angles between adjacent struts without the latter having to bow or bend.

Abstract: This invention relates to a canopy assembly for use in combination with a force-fed supply of hot humidified air to be used in the curing of repair patches on airborne radar domes, such a canopy assembly including a flexible donut-shaped inflatable distributor having an inlet on its outer periphery connectable to the source of air and a plurality of apertures spaced around its inside margin for distributing the air more or less radially inward over the patch, a plurality of tie-down straps encircling the distributor tube spaced around its periphery, a like member of suction cups detachably connectable to the tie-down straps for mounting the tube in encircling relation to the patch to be cured, a flexible shroud of a size and shape effective to cooperate with the distributor to define a protective cover over the patch, and means depending from the margins of the shroud detachably connectable to the strap and suction cup subassemblies for releasably interconnecting same in roof-forming relation atop the distrib

Abstract: This invention relates to a tent consisting of an open-bottomed roofed canopy and foldable frame having cornerposts detachably connectable to various socketed supporting structures cooperating therewith to define an aerial tent, a tent for a cherry picker bucket and a ground tent for use in covering the entryway through a manhole to an underground installation. The support subassembly adapting the tent for use as an aerial tent includes vise-like cable clamps detachably connectable to an overhead cable, upwardly divergent sockets for receiving the cornerposts of the frame and ties for connecting the canopy to supports positioned above the cable. A second support subassembly provides socketed arms depending from a cherry picker bucket that detachably receive the tent frame cornerposts. The latter subassembly includes a high voltage version wherein the arms are detachably secured to the bucket without penetrating same by means of a belted sling.

Abstract: This invention relates to a portable ventilating apparatus particularly well suited for use in purging underground installations characterized by a collar having a deflector atop thereof mountable within an entryway on the surface leading below ground, a duct hanging from the underside of the collar extendable well down into the area to be ventilated in spaced relation to the entryway so as to leave an annular exhaust passage therebetween, a tapered nozzle supported within the mouth of the collar cooperating with the deflector to define an annular air intake passage, and a blower mounted within the nozzle for directing a stream of air down the duct, said blower and nozzle cooperating to inspirate clean air into the duct through the air intake passage and using it to force any foul air out through the exhaust opening across the deflector which disperses it and thus prevents the latter from being returned underground.

Abstract: This invention relates to a heat-resistant air-distributing sheath foldable into encircling relation about a section of damaged cable or the like encased in a heat-shrinkable sleeve, said sheath being characterized by a tangentially-directed tubular inlet connectable to a source of forced hot air, cooperating pairs of arcuate rigid ribs housed within circumferential pockets adjacent opposite ends of said sheath movable from an open cable-receiving position into a closed cable-encircling one, means depending from said sheath for tying or otherwise hanging same from an overhead support, flexible tubular cuffs at opposite ends equipped with drawstrings for regulating the size of the openings through which the air exits the sheath, and a deflector at the point where the air enters the sheath effective to direct the airflow in a helical path towards the opposite open ends thereof.